So, it seems to now be available, thanks if that was the make team taking a look!
New problem is that the payout seems to get a “Not allowed on standard account” error, which appears to be with the permissions being given to Make via the oAuth connection.
Is the only fix for this adding extra API details, and if I do that is there a guide to getting a “restricted key” set up with the right permissions? Is there any way to extend the permissions given via oAuth?
I’ll update here if I find an answer.
EDIT: Yes, switching to the API allowed it to create the payout.